Caution!
Damage to seals and threads
Stainless steel threads tend to seize and cold weld and must be greased.
Damage to seals and threads can result in malfunction.
► Ensure that an adequate film of lubricant is applied. No grease residues
must be visible once the valve has been assembled completely.
► For product contact seals only use suitable greases and oils.
► Observe the safety data sheets issued by the lubricant manufacturer.
Carry out the following steps:
1.
Apply a light film of lubricant to all threads.
2.
Grease all seals – including the O-rings at the top and bottom of the actuator
piston stem – very thinly.
®
! Do not grease the V-ring.
3.
Grease the balancer.
4.
Grease the inside of the seal ring (65) (contact surface).
Fig.54
®
Done
Maintenance
Maintenance
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17.04.2023
